What is Reddit's opinion ofGosky Astronomical Extension Tube - T2 Extension Ring Adapter for Cameras and Eyepieces - Length 15mm - M42x0.75 on Both Sides?
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GOSKY Smartphone Adapter Mount Regular Size - Compatible with Binoculars, Monoculars, Spotting Scopes, Telescope, Microscopes - Fits almost all Smartphones on the Market - Record Nature and The World